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XXYY syndrome

a disorder in which a male is born with a double complement of the normal XY chromosome pair (46, XY). Skeletal deformities, genital anomalies leading to infertility, enlarged breasts, and eunuchoid abdominal and hip fat are among the physical traits. Learning disabilities, especially reading problems, are common, along with delayed development of motor skills. Also called 48,XXYY syndrome.

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Psychology term of the day

June 16th 2024

method of residues

method of residues

the fourth of the five canons of empirical science laid down by John Stuart Mill. It is meant to establish sufficient conditions for a phenomenon through the elimination of alternative potential causes on the basis of previous experiments or already known laws. For example, if the phenomena E1 and E2 occur together having antecedents C1 and C2, and if it is known by prior research or established law that C1 cannot cause E2 but causes E1, one may conclude that C2 is the cause of E2. Also called residue method.